Ephemeral Paradox is dropped from Grand Magistrix Elisande in The Nighthold, the largest structure in the Broken Isles, and among the grandest in all of Azeroth.
1. You will get Ephemeral Paradox.
2. You need to provide your account.
3. Your character's level should be 50.
4. ETA: 1-3 CDs.
Tips: The item drops on its drop rate. Drop rate increases with Seal of Broken Fate.